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I.Factor the following mathematical expressions.
1. x16 – 256
2. 20x2 + 54x – 18
3. x22 – 16129
4. x224 – 25
5. x256 – 1296
6. 11x2 – 8x + 19
7. 13x2 + 4x – 17
8. x728 – 6561
9. 15x2 – 29x + 12
10. x120 – 144